| 摘要 |
A clutch mechanism of the type constituted by a toothed wheel ( 3 ) driven by an endless screw ( 12 ), this wheel ( 3 ) being securable to a driven shaft ( 15 ) via two friction cones ( 5 ) disposed coaxially to the axial bore of the toothed wheel ( 3 ), and coacting, under the action of a control device ( 7, 13 ), with conical contact areas on the wheel ( 3 ). The toothed wheel ( 3 ) is made of a synthetic material, the bore of this toothed wheel ( 3 ) having an annular partition ( 16 ) delimiting on each side a shouldered recess for the reception of a metallic ring ( 4 ) secured in rotation to the wheel ( 3 ), this ring ( 4 ) comprising internally a conical contact area ( 4 A) adapted to coact with the metallic friction cone ( 5 ).
|
